linux-kernel - Re: [PATCH v6 4/9] x86/nmi: Assign and register NMI-source vectors

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Message-ID: <58556be3-0516-4204-b19d-11cba7b21423@intel.com>
Date: Tue, 3 Jun 2025 14:54:03 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Sohil Mehta <sohil.mehta@...el.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Cc: Xin Li <xin@...or.com>, "H . Peter Anvin" <hpa@...or.com>,
 Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>,
 Sean Christopherson <seanjc@...gle.com>,
 Adrian Hunter <adrian.hunter@...el.com>,
 Kan Liang <kan.liang@...ux.intel.com>, Tony Luck <tony.luck@...el.com>,
 Zhang Rui <rui.zhang@...el.com>, Steven Rostedt <rostedt@...dmis.org>,
 Andrew Cooper <andrew.cooper3@...rix.com>,
 "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
 Jacob Pan <jacob.pan@...ux.microsoft.com>, Andi Kleen <ak@...ux.intel.com>,
 Kai Huang <kai.huang@...el.com>, Sandipan Das <sandipan.das@....com>,
 linux-perf-users@...r.kernel.org, linux-edac@...r.kernel.org,
 kvm@...r.kernel.org, linux-pm@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v6 4/9] x86/nmi: Assign and register NMI-source vectors

On 6/3/25 13:22, Sohil Mehta wrote:
> With an enum, it's harder to figure out the exact sources when let's say
> the source bitmap is printed as 0x0090.

Uhh, then don't print a bitmap. ;)

/proc/cpuinfo doesn't print out CPUID leaves, it prints out bits mapped
to strings.

Look at the kmalloc trace points:

            Xorg-4589    [003] ..... 1568557.823993: kmalloc: ...
gfp_flags=GFP_KERNEL
            Xorg-4589    [003] ..... 1568557.823993: kmalloc: ...
gfp_flags=GFP_KERNEL

gfp_flags are a bitmap, yet they're mapped out with strings and symbolic
names.